Motorcycle sprocket 428-17T 1)45# steel,16 # Mn,A3 steel 2)Wide range ... chain & sprocket 3)High quality low price Motorcycle sprocket 428-17T The following is sprockets' detailed information:1) Material:45# steel ... ,428,428H,520..etc3) Front gear:13T,14T,15T,16T,17T..etc4) Rear gear:34T,35T,36T,37T,38T,57T..etc ... product,please contact us without hesitation.Jenny13283294813 Motorcycle sprocket 428-17T